I am a bit lost right now

I am 29m, I just moved back to my parents as my mental health was declining too much, and I was a burden for my gf of 11 years, we are still technically together, but because of my mental health, I need to work on myself and get better. However, right now I have lots of life stressors( mum, is quite sick, shitty relationship with my sister and my dad needs to take care of my mum). However, I'm worried my mental health will take me out right now. I'm also in the process of quitting weed. My gf is a saint and has stuck with me for so long, we still talk and I give her updates but I need to fix myself and then I can go up to be with her. I don't believe the relationship is fully broken, there's still hope. I really love this girl and I don't want to lose her, I know she still loves me. I honestly want to tap out at this stage, but I cannot. I'm at rock bottom right now and I need to change, I want to tap out every day right now, I kinda did a shif attempt that landed me in hospital but I know deep down, I can't take my life but I really want to right now. I just want some direction to try and get out of the rock bottom. Any help or advice would be well appreciated 👍